1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * (C) 2010 Pablo Neira Ayuso <pablo@netfilter.org> 4 */ 5 6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 7 8 #include <linux/netfilter.h> 9 #include <linux/slab.h> 10 #include <linux/kernel.h> 11 #include <linux/moduleparam.h> 12 13 #include <net/netfilter/nf_conntrack.h> 14 #include <net/netfilter/nf_conntrack_extend.h> 15 #include <net/netfilter/nf_conntrack_timestamp.h> 16 17 static bool nf_ct_tstamp __read_mostly; 18 19 module_param_named(tstamp, nf_ct_tstamp, bool, 0644); 20 MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping."); 21 22 static const struct nf_ct_ext_type tstamp_extend = { 23 .len = sizeof(struct nf_conn_tstamp), 24 .align = __alignof__(struct nf_conn_tstamp), 25 .id = NF_CT_EXT_TSTAMP, 26 }; 27 nf_conntrack_tstamp_pernet_init(struct net * net)28void nf_conntrack_tstamp_pernet_init(struct net *net) 29 { 30 net->ct.sysctl_tstamp = nf_ct_tstamp; 31 } 32 nf_conntrack_tstamp_init(void)33int nf_conntrack_tstamp_init(void) 34 { 35 int ret; 36 ret = nf_ct_extend_register(&tstamp_extend); 37 if (ret < 0) 38 pr_err("Unable to register extension\n"); 39 return ret; 40 } 41 nf_conntrack_tstamp_fini(void)42void nf_conntrack_tstamp_fini(void) 43 { 44 nf_ct_extend_unregister(&tstamp_extend); 45 } 46